package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

/**
 * 分类业务层
 */
@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 分页查询
     * @param categoryPageQueryDTO 分页查询的传递的数据模型
     * @return PageResult——total records
     */
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> Page = categoryMapper.pageQuery(categoryPageQueryDTO);
        long total = Page.getTotal();
        List<Category> result = Page.getResult();
        PageResult pageResult = new PageResult(total,result);
        return pageResult;
    }

    /**
     * 启用禁用分类
     * @param status 状态
     * @param id 分类id
     */
    public void StartOrStop(Integer status, Long id) {
        // 1、用分类实体类封装
        Category category = Category.builder()
                .id(id)
                .status(status)
//                .updateTime(LocalDateTime.now())
//                .updateUser(BaseContext.getCurrentId())
                .build();
        // 2、调用mapper类进行处理
        categoryMapper.updata(category);
    }

    /**
     * 根据id修改分类
     * @param categoryDTO 新增-修改分类传递的数据模型
     */
    public void updata(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.updata(category);
    }

    /**
     * 新增分类
     * @param categoryDTO 新增-修改分类传递的数据模型
     */
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        category.setStatus(StatusConstant.DISABLE);
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.insert(category);
    }

    /**
     * 根据id删除分类
     * @param id 分类id
     */
    public void deleteById(Long id) {
        // 1、判断当前分类是否关联了菜品，如果关联了，抛出业务异常
        Integer count = dishMapper.CountByCategoryId(id);
        if (count > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        // 2、判断当前分类是否关联了套餐，如果关联了，抛出业务异常
        count = setmealMapper.CountByCategoryId(id);
        if (count > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        // 3、根据id删除分类数据
        categoryMapper.deleteById(id);
    }

    /**
     * 根据类型查询分类
     * @param type 分类类型
     * @return 分类集合
     */
    public List<Category> list(Integer type) {
        List<Category> categories = categoryMapper.list(type);
        return categories;
    }
}
